OK, let's crack this. We're given 983 and our task is to multiply it by 155. Essentially, we'll be adding 983 to itself 155 times.
Step 1: 0 + 983 = 983
Step 2: 983 + 983 = 1966
Step 3: 1966 + 983 = 2949
Step 4: 2949 + 983 = 3932
Step 5: 3932 + 983 = 4915
Step 6: 4915 + 983 = 5898
Step 7: 5898 + 983 = 6881
Step 8: 6881 + 983 = 7864
Step 9: 7864 + 983 = 8847
Step 10: 8847 + 983 = 9830
Step 11: 9830 + 983 = 10813
Step 12: 10813 + 983 = 11796
Step 13: 11796 + 983 = 12779
Step 14: 12779 + 983 = 13762
Step 15: 13762 + 983 = 14745
Step 16: 14745 + 983 = 15728
Step 17: 15728 + 983 = 16711
Step 18: 16711 + 983 = 17694
Step 19: 17694 + 983 = 18677
Step 20: 18677 + 983 = 19660
Step 21: 19660 + 983 = 20643
Step 22: 20643 + 983 = 21626
Step 23: 21626 + 983 = 22609
Step 24: 22609 + 983 = 23592
Step 25: 23592 + 983 = 24575
Step 26: 24575 + 983 = 25558
Step 27: 25558 + 983 = 26541
Step 28: 26541 + 983 = 27524
Step 29: 27524 + 983 = 28507
Step 30: 28507 + 983 = 29490
Step 31: 29490 + 983 = 30473
Step 32: 30473 + 983 = 31456
Step 33: 31456 + 983 = 32439
Step 34: 32439 + 983 = 33422
Step 35: 33422 + 983 = 34405
Step 36: 34405 + 983 = 35388
Step 37: 35388 + 983 = 36371
Step 38: 36371 + 983 = 37354
Step 39: 37354 + 983 = 38337
Step 40: 38337 + 983 = 39320
Step 41: 39320 + 983 = 40303
Step 42: 40303 + 983 = 41286
Step 43: 41286 + 983 = 42269
Step 44: 42269 + 983 = 43252
Step 45: 43252 + 983 = 44235
Step 46: 44235 + 983 = 45218
Step 47: 45218 + 983 = 46201
Step 48: 46201 + 983 = 47184
Step 49: 47184 + 983 = 48167
Step 50: 48167 + 983 = 49150
Step 51: 49150 + 983 = 50133
Step 52: 50133 + 983 = 51116
Step 53: 51116 + 983 = 52099
Step 54: 52099 + 983 = 53082
Step 55: 53082 + 983 = 54065
Step 56: 54065 + 983 = 55048
Step 57: 55048 + 983 = 56031
Step 58: 56031 + 983 = 57014
Step 59: 57014 + 983 = 57997
Step 60: 57997 + 983 = 58980
Step 61: 58980 + 983 = 59963
Step 62: 59963 + 983 = 60946
Step 63: 60946 + 983 = 61929
Step 64: 61929 + 983 = 62912
Step 65: 62912 + 983 = 63895
Step 66: 63895 + 983 = 64878
Step 67: 64878 + 983 = 65861
Step 68: 65861 + 983 = 66844
Step 69: 66844 + 983 = 67827
Step 70: 67827 + 983 = 68810
Step 71: 68810 + 983 = 69793
Step 72: 69793 + 983 = 70776
Step 73: 70776 + 983 = 71759
Step 74: 71759 + 983 = 72742
Step 75: 72742 + 983 = 73725
Step 76: 73725 + 983 = 74708
Step 77: 74708 + 983 = 75691
Step 78: 75691 + 983 = 76674
Step 79: 76674 + 983 = 77657
Step 80: 77657 + 983 = 78640
Step 81: 78640 + 983 = 79623
Step 82: 79623 + 983 = 80606
Step 83: 80606 + 983 = 81589
Step 84: 81589 + 983 = 82572
Step 85: 82572 + 983 = 83555
Step 86: 83555 + 983 = 84538
Step 87: 84538 + 983 = 85521
Step 88: 85521 + 983 = 86504
Step 89: 86504 + 983 = 87487
Step 90: 87487 + 983 = 88470
Step 91: 88470 + 983 = 89453
Step 92: 89453 + 983 = 90436
Step 93: 90436 + 983 = 91419
Step 94: 91419 + 983 = 92402
Step 95: 92402 + 983 = 93385
Step 96: 93385 + 983 = 94368
Step 97: 94368 + 983 = 95351
Step 98: 95351 + 983 = 96334
Step 99: 96334 + 983 = 97317
Step 100: 97317 + 983 = 98300
Step 101: 98300 + 983 = 99283
Step 102: 99283 + 983 = 100266
Step 103: 100266 + 983 = 101249
Step 104: 101249 + 983 = 102232
Step 105: 102232 + 983 = 103215
Step 106: 103215 + 983 = 104198
Step 107: 104198 + 983 = 105181
Step 108: 105181 + 983 = 106164
Step 109: 106164 + 983 = 107147
Step 110: 107147 + 983 = 108130
Step 111: 108130 + 983 = 109113
Step 112: 109113 + 983 = 110096
Step 113: 110096 + 983 = 111079
Step 114: 111079 + 983 = 112062
Step 115: 112062 + 983 = 113045
Step 116: 113045 + 983 = 114028
Step 117: 114028 + 983 = 115011
Step 118: 115011 + 983 = 115994
Step 119: 115994 + 983 = 116977
Step 120: 116977 + 983 = 117960
Step 121: 117960 + 983 = 118943
Step 122: 118943 + 983 = 119926
Step 123: 119926 + 983 = 120909
Step 124: 120909 + 983 = 121892
Step 125: 121892 + 983 = 122875
Step 126: 122875 + 983 = 123858
Step 127: 123858 + 983 = 124841
Step 128: 124841 + 983 = 125824
Step 129: 125824 + 983 = 126807
Step 130: 126807 + 983 = 127790
Step 131: 127790 + 983 = 128773
Step 132: 128773 + 983 = 129756
Step 133: 129756 + 983 = 130739
Step 134: 130739 + 983 = 131722
Step 135: 131722 + 983 = 132705
Step 136: 132705 + 983 = 133688
Step 137: 133688 + 983 = 134671
Step 138: 134671 + 983 = 135654
Step 139: 135654 + 983 = 136637
Step 140: 136637 + 983 = 137620
Step 141: 137620 + 983 = 138603
Step 142: 138603 + 983 = 139586
Step 143: 139586 + 983 = 140569
Step 144: 140569 + 983 = 141552
Step 145: 141552 + 983 = 142535
Step 146: 142535 + 983 = 143518
Step 147: 143518 + 983 = 144501
Step 148: 144501 + 983 = 145484
Step 149: 145484 + 983 = 146467
Step 150: 146467 + 983 = 147450
Step 151: 147450 + 983 = 148433
Step 152: 148433 + 983 = 149416
Step 153: 149416 + 983 = 150399
Step 154: 150399 + 983 = 151382
Step 155: 151382 + 983 = 152365

So, 983*155 = 152365